Flue gas medium-temperature denitrification system for gas engine
A gas internal combustion engine and flue gas technology, applied in the field of warm denitrification system, can solve the problems of gas internal combustion engine flue gas denitrification, reducing agent ammonia gas generation, etc.
Pending Publication Date: 2019-04-05
北京工大环能科技有限公司
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Problems solved by technology
[0009] The main purpose of the present invention is to solve the gas internal combustion engine flue gas denitrification problem and the generation problem of the required reducing agent ammonia in the gas internal combustion engine flue gas denitrification system
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[0030] In the following, the present invention will be further described by taking the flue gas denitrification system of a 4.4MW gas-fired internal combustion engine unit of a distributed energy station as an example in conjunction with the drawings.
[0031] A distributed energy station 4.4MW gas internal combustion engine unit SCR flue gas denitrification system, such as figure 2 and image 3 , the flue gas temperature at the exhaust outlet of the gas internal combustion engine is 430-550°C, the highest can reach 600°C, the power generation output is 4.4MW, and the flue gas volume is 19888Nm in dry state when the load rate of the gas internal combustion engine is 100%. 3 / h, at standard state, dry basis 5%O 2 condition NO x Both are 500mg / Nm 3 The flue gas outlet temperature of lithium bromide equipment 16 is 145 ℃; The suitable temperature range of catalyst 4 is 320~450 ℃;
[0032] After the flue gas passes through the waste heat boiler 2, the temperature will be 400°...
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The invention discloses a flue gas medium-temperature denitrification system for a gas engine. The system comprises a gas engine smoke outlet, a waste heat boiler, an SCR (selective catalytic reduction) reactor, a catalyst, a chimney, an ammonia gas generator, a urea solution tank, a compressed air tank, a urea solution pipe, a compressed air pipe, a spray gun, an adjusting valve, a fan, a bypassflue, a flue and a lithium bromide device. The ammonia gas generator comprises an ammonia gas generator inner wall, a first effect-raising ring, a first turbulent flow cone, a second effect-raising ring, a third effect-raising ring and a second turbulent flow cone. The system can adopt the medium-temperature catalyst which is full on the market and low in market price, so that the construction cost and long-term operating cost of gas engine flue gas denitrification engineering can be reduced. The invention further relates to the ammonia gas generator for preparing ammonia gas, and the ammoniagas conversion rate of urea is increased by optimal design of the structure of the ammonia gas generator.
Description
technical field [0001] The invention relates to a medium-temperature denitrification system for gas internal combustion engine flue gas, belonging to the field of gas internal combustion engine flue gas denitrification. Background technique [0002] With the development of social economy, especially industrial economy, air pollution is becoming more and more serious. One of the main components of air pollutants is nitrogen oxides. Nitrogen oxides not only stimulate the human respiratory system, damage animals and plants, and destroy the ozone layer, but also are one of the main substances that cause greenhouse effect, acid rain and photochemical reactions. Gas-fired internal combustion engines, because of their flexibility, high efficiency, and low emissions, can realize cascade utilization of energy through the combined supply of cold, heat, and electricity, and are widely used in energy-intensive facilities, such as municipalities, industrial parks, and commercial real est...
Claims
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Login to View More IPC IPC(8): B01D53/94B01D53/56
CPCB01D53/9418B01D2251/2062B01D2258/0283Y02T10/12
Inventor 黄庆华
Owner 北京工大环能科技有限公司